Truly, not many are using Ofbiz, The link which is posted above shows a list of maybe 70 websites, if you click on them you will see that most websites are DOWN.
Those who are not down, have not been updated for years.

So long story short, Ofbiz is a dead-end.
I can strongly just warn people to specify their skills with Ofbiz.
No company actually needs this. I just googled and searched for Jobs in whole Germany for companies who are looking for people who know how to deal with Ofbiz. Results ZERO.